Controlling Access To Referenced Files And Xobjects; Internet Url Access - Adobe 22002484 Manual

Acrobat Family of Products
Security Feature User Guide

8.6 Controlling Access to Referenced Files and XObjects

Your application can inform you when a PDF file is attempting to access external content identified as a
stream object by flags as specified in the PDF Reference. For example, a URL might point to an image
external to the document. Only PDF developers create PDF files with streams, so you may not need to
enable access to external content.
Silently transmitting data represents a security risk since malicious content can be transferred whenever
the application communicates with an external source. Therefore, you may want to disable this feature.
To configure external content access:
1. Choose Edit > Preferences (Windows) or Acrobat > Preferences (Macintosh).
2. Select Page Display in the Categories panel.
3. Configure the Reference XObjects View Mode panel:
Set Show reference XObject targets to:




4. Set the location of referenced files (if any).
5. Choose OK.

8.7 Internet URL Access

Your application can inform you when a PDF file is attempting to connect to an Internet site. Opening a
Web page represents a security risk because malicious content can be transferred whenever the
application communicates with the Internet. In addition to visible links in a PDF document, form fields can
contain hidden JavaScript calls that open a page in a browser or silently requests data from the Internet.
You can control Internet access via the Manage Internet Access dialog
for the following:
"Turning Internet Access Off and On" on page 110

"Allowing and Blocking Specific Web Sites" on page 111

Always:
Never:
Only PDF/X-5 compliant ones:
Figure 87 Resource access
Tip: This feature interacts with the new Security (Enhanced) preference feature. URLs that are
set as privileged locations will bypass enhanced security restrictions if enhanced security
is on.
External Content and Document Security
Controlling Access to Referenced Files and XObjects
(Figure 89). Controls are provided
109